Delete Excel WorkSheet

Add a new blank sheet to the workbook

Make a copy of an existing sheet

Keep the headings on screen while the rest of the sheet scrolls

Find where the data on a sheet starts and ends. Worked out from cells that hold something, so a cell that was formatted and then emptied does not count

Hide working rows, columns or sheets without deleting them, so the formulas that depend on them still work

Stop a sheet being edited by accident. This is not security: an Excel sheet password is trivially removed, so use it to protect a report from mistakes rather than to keep a secret